What is the difference between IDE and AHCI? Well, besides hot swapping.

I ask this because my Asus Sabertooth Z77 no longer wants to boot my Vertex 4 SSD in AHCI (unless I enjoy the BSOD during read/write), but IDE boots up just fine (besides it being horribly slower).
Now, I have the latest firmware for my SSD, latest BIOS update, and any other HDD does the same thing. Changed my RAM, reset my BIOS, put in SATA cables; no change. IDE mode boots fine, AHCI no longer works. Any clues to why?

Hey guys I need your help, my new system on a P8Z77-V is running great, although I couldn't find the Dram voltage in either Bios or AI Suite II. Where can I find it?

NVM, found it in OC settins and it is under Auto(1.356) running my Ram 1866 9-9-9-24.

Alright, after clearing the AI Suite uninstall/reinstall SNAFU, my only problem is that the iGPU driver refuse to load claiming the system don't meet the minimum requirement(using a 3570K so obviously I have a HD4000), it is probably something I need to enable in BIOS but I don't know which one.

Another minor issue is when I try to install the Chipset driver(latest from ASUS website), the ASUSsetup.exe would claim I am using WinNT_64 OS( am using a Win7 Pro 64 bit) and it is not compatible with the driver, however when I run Setup.exe it will install the driver without a hiccup.Edited by sherlock - 9/25/12 at 7:36am

What is the difference between IDE and AHCI? Well, besides hot swapping.
I ask this because my Asus Sabertooth Z77 no longer wants to boot my Vertex 4 SSD in AHCI (unless I enjoy the BSOD during read/write), but IDE boots up just fine (besides it being horribly slower).
Now, I have the latest firmware for my SSD, latest BIOS update, and any other HDD does the same thing. Changed my RAM, reset my BIOS, put in SATA cables; no change. IDE mode boots fine, AHCI no longer works. Any clues to why?
Thanks
My post regarding issue - http://www.overclock.net/t/1309477/asus-sabertooth-z77-no-longer-boots-ahci

When you originally installed Windows, it was in AHCI mode correct? If not, reformat and reinstall. Another option is trying another SATA port on your Sabertooth (you are using the Intel SATA3 ports I assume).

Hey guys I need your help, my new system on a P8Z77-V is running great, although I couldn't find the Dram voltage in either Bios or AI Suite II. Where can I find it?
NVM, found it in OC settins and it is under Auto(1.356) running my Ram 1866 9-9-9-24.
Alright, after clearing the AI Suite uninstall/reinstall SNAFU, my only problem is that the iGPU driver refuse to load claiming the system don't meet the minimum requirement(using a 3570K so obviously I have a HD4000), it is probably something I need to enable in BIOS but I don't know which one.
Another minor issue is when I try to install the Chipset driver(latest from ASUS website), the ASUSsetup.exe would claim I am using WinNT_64 OS( am using a Win7 Pro 64 bit) and it is not compatible with the driver, however when I run Setup.exe it will install the driver without a hiccup.

Thanks for the help, the Intel Chipset driver you pointed me to installed and my computer have been running fine, thanks.
Regarding the iGPU, I tried to download the latest version from Intel and the same message pops up:
It is not an major issue(so far only thing I can't use is Virtu).

You have to be running off the integrated GPU in order for it to install.

You can use the dGPU while installing the iGPU driver, but make sure you've actually enabled iGPU in BIOS..

Where in the BIOS should I try to find this?

NVM I found it under the Graphics tab, I enabled iGPU multimonitor an installed the driver successfully, Virtu to follow.

BTW, I figured out what was behind mine(and most people's) Fan Xpert 2 crashes, it is because ASUS coded their registry poorly so a registry cleaner like Tune-up utilities would deem a critical ASUS registry as expendable and proceed to delete it, here is the whole story:

My Fan Xpert2 had the "Can not load AsacpiEx.dll" yesterday, I had to do a complete registry clean-up to get a clean install done then reinstall it. Now today after tune-up utilities nailed a ASUSFanControl registry during registry clean-up it started causing issues again. Now I get this when I try to activate Fan Xpert2:

^^ Just because my name is Adr I came to give great news to the people that are having issue with Asus software not letting Fan Xpert 2 install (because they relay too much on registry entry >.> REALLY BAD IDEA!)

Anyways ^^

Step 1: Uninstall Fan Xpert 2-
Uninstall Asus Fan Xpert 2 by going to start->All Programs->Asus-AI Suite II->Uninstall.exe It'll ask what you want to uninstall. Just select the Fan Xpert 2. Give it time as it uninstalls the program it’ll then ask you to restart. Go on and restart.

Step 2: Shut down Services-
You would think that uninstalling the programs would clean up the service? Well you guess wrong lol. Go to start->run->type 'services.msc' without the ''and then hit enter->Find the Asus services AsusFanControlService and right click it. Hit Stop. If you don't see it, keep looking or skip this step.

Step 3: Optional delete more- I do not know if this step helped or not (I have a feeling it did not, but just in case) once you have stop the service you can now delete the folder it was in. Go to the following location: 'C:\Program Files (x86)\ASUS\AsusFanControlService' and delete only that folder.

Step 4: Remove the entry in the registry-
The next step is really important you followed the first two steps right, so please make sure you did em and that you restarted your computer after the uninstall. Do the follow manual To do it manually: go to start->run-> type in 'regedit' and enter. On this screen, you need to navigate to the following location: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ASUS\AsusFanService(if this don't exist at that location skip this step) and delete that entry by selecting the entry and hiting delete on it. *Note, only delete the AsusFanService entry and leave everything else alone... please exit the program once done. Then restart your computer for the settings to take place.

Step 5: Reinstalling-
Download the newest version for it at the website. Once downloaded, unzip it and go to the Setup.exe and just check the Fan Xpert 2 to be installed. Once it's finished, it'll ask to restart. Go on and do so.

There you go ^^ should install right now. This will also work for when someone misuses a registry cleaner also. This might even work for other issues with the Asus software...

>.>; They really need to lay off the registry coding or make sure their coding is safe from registry cleaners or from registry cruption.

Update: The method I quoted above have fixed my Fan Xpert2. I turned off automatic maintenance in tune-up utilities so that the registry won't get screwed up without my notice. Using tune-up utilities registry checking I found a single registry error, the same one that caused my Xpert2 to malfunction:

If you have Fan Xpert2 installed and run a registry cleaning program like Tune-up utilities make sure you disable automatic maintenance and check for this registry when it present you with a list of registries to clean.

If this show up, don't one click clean the registry, make sure you uncheck this registry on the maintainance window to prevent it from getting deleted as it have been proven in my case that deleting this cause my Xpert2 to Malfunction and refuse to load.Edited by sherlock - 9/26/12 at 7:24am